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-rw-r--r--testsuite/tests/polykinds/T14580.hs8
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diff --git a/testsuite/tests/polykinds/T14580.hs b/testsuite/tests/polykinds/T14580.hs
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+++ b/testsuite/tests/polykinds/T14580.hs
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+{-# LANGUAGE PolyKinds, DataKinds, TypeOperators #-}
+module T14580 where
+import Data.Kind
+
+type Cat ob = ob -> ob -> Type
+data ISO' :: Cat i -> i -> i -> Type
+type ISO cat a b = ISO' cat a b -> Type
+type (a <--> b) iso cat = ISO (iso :: cat a b)